Monsters of the Paleozoic: sea scorpions

Eupteryds are an extinct group of Paleozoic aquatic arthropods.

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Dentition of mammals

The dentition of different species of mammals reflect their feeding habits.

Diversity of light-detecting organs

Several analogous types of eyes have developed independently through convergent evolution.

The brown bear

Let’s see how a bear, which the most popular chidren's toy was modelled after, lives in real life.

American bison

The American bison is the largest land animal in North America.

Emperor penguin

Penguins are birds living in the Antarctic and adapted to cold temperature and swimming.


Lemurs only live on the island of Madagascar. Here are a number of fascinating facts about them.

Freshwater fishes

Many freshwater fishes are also popular as food.


A transitional form between fish and tetrapods, or four-limbed vertebrates.

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